Influence of impeller parameters on pressure fluctuation in pump outlet
CHAI Liping1, YE Huan2, REN Zhiming1, LI Hui1
1. Institute of Chemical Machinery, Hefei University of Technology, Hefei, Anhui 230009, China; 2.School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
Abstract In order to study the vibration performance of series-parallel pump′s outlet, fast Fourier transform and multi-coherent analysis technique was used to analyze the pressure data. Firstly, the orthogonal experiment of two parameters and three levels was carried out to evaluate the influence of the number of blades and the blade angle on impeller′s outlet. Then, the pressure signal of impeller′s outlet was fitted, the fitting degree of three signals was 0.809 6, 0.818 0 and 0.719 4, and was fitted the multi-coherent analysis technique was fitted to reveal the influence of primary and secondary impellers. The results indicates that the peak of frequency domain of impeller′s outlet pressure appears in the position of blade frequency, which accords with the rotation rule;the number of primary impeller′s blades affects the pump outlet pressure fluctuation most; and the peak value of pump′s outlet pressure reduces when the number of primary impeller′s blades increases. The research can be as a reference for the design of series-parallel pump.
YUAN Shouqi, XUE Fei, YUAN Jianping, et al. Experimental study on impact of pressure fluctuation on flow noise in centrifugal pump [J]. Journal of drainage and irrigation machinery engineering, 2009, 27(5):287-290.(in Chinese)
徐朝晖. 高速离心泵内全流道三维流动及其流体诱发压力脉动研究[D]. 北京:清华大学, 2004.
李绍旭. 串并联泵内部流场特性研究[D]. 合肥:合肥工业大学, 2015.
刘阳. 离心泵的压力脉动研究进展[J]. 流体机械, 2008, 36(9):33-37.
LIU Yang. Overview of pressure fluctuation in centrifugal pump [J]. Fluid machinery, 2008, 36(9):33-37.(in Chinese)
关醒凡. 现代泵技术手册[M].北京:中国宇航出版社, 1995.
CHAI L, LI S, HU H, et al. Analysis of impeller geometric parameters affecting the centrifugal pump cavitation performance based on CFD simulations[C]// Proceedings of the 6th International Symposium on Fluid Machinery and Fluid Engineering. Wuhan: IET, 2014:1-5.
YUAN Shouqi, NI Yongyan. Unsteady turbulent simulation and pressure fluctuation analysis for centrifugal pumps[J]. Chinese journal of mechanical engineering, 2009, 22(1):1-6
YAO Zhifeng, WANG Fujun, YANG Min, et al. Effects of impeller type on pressure fluctuations in double-suction centrifugal pump [J]. Journal of mechanical engineering, 2011, 47(12): 133-143.(in Chinese)
HE Y J, YANG Y, LI Y. Numerical investigation into influence of clearance on pressure fluctuation[C]// Proceedings of the 6th International Symposium on Fluid Machinery and Fluid Engineering. Wuhan: IET, 2014:77-81.
YAO Zhifeng, WANG Fujun, XIAO Ruofu, et al. Key issues in pressure fluctuation experiments for centrifugal pumps [J]. Journal of drainage and irrigation machinery engineering, 2010, 28(3):219-223.(in Chinese)